File:Acari,ダニ、壁蝨、蜱、蟎P7257804a.jpg
Acari,ダニ、壁蝨、蜱、蟎P7257804a.jpg (526 × 443 pixels, file size: 50 KB, MIME type: image/jpeg)
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Summary
DescriptionAcari,ダニ、壁蝨、蜱、蟎P7257804a.jpg |
English: Acari (or Acarina) are a taxon of arachnids that contains mites and ticks. The diversity of the Acari is extraordinary and its fossil history goes back to at least the early Devonian period.[1] As a result, acarologists (the people who study mites and ticks) have proposed a complex set of taxonomic ranks to classify mites. In most modern treatments, the Acari is considered a subclass of Arachnida and is composed of 2-3 superorders or orders: Acariformes (or Actinotrichida), Parasitiformes (or Anactinotrichida), and Opilioacariformes; the latter is often considered a subgroup within the Parasitiformes. The monophyly of the Acari is open to debate and the relationships of the acarines to other arachnids is not at all clear. In older treatments the subgroups of the Acarina were placed at order rank, but as their own subdivisions have become better-understood it is more usual to treat them at superorder rank.
Most acarines are minute to small (e.g. 0.08–1.00 millimetre or 0.0031–0.039 inch), but the largest Acari (some ticks and red velvet mites) may reach lengths of 10–20 millimetres (0.39–0.79 in). It is estimated that over 50,000 species have been described (as of 1999) and that a million or more species are currently living. The study of mites and ticks is called acarology (from Greek ἀκάρι, akari, a type of mite; and -λογία, -logia)[2], and the leading scientific journals for acarology include Acarologia, Experimental and Applied Acarology and the International Journal of Acarology.
日本語: ダニ(壁蝨、蜱、蟎)とは、節足動物門鋏角亜門クモ綱ダニ目に属する動物の総称である。世界で約2万種と言われている。比較的小型のものが多く、大きいものでも1cm程度。
ダニを意味する漢字の内、中国語ではマダニ類を蜱(pí)、それ以外のケダニ類、コナダニ類などを蟎(mǎn)と区別し、総称として蜱蟎と呼ぶ。 ダニを意味する日本語の方言語彙には、ごさらぎ(和歌山県)、さらげ(熊本県)、しだりめ(東京都八丈島)、たにこ(京都府)、たのほじ(島根県)、たんじろう(新潟県中魚沼郡)、だんにゃま(鹿児島県)、ふつみ(山口県)、やえ(山口県)などがある。ちなみに、愛知県知多郡では、だにがハエの幼虫を意味した。 |
Date | |
Source | 松岡明芳 |
Author | 松岡明芳 |
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current | 19:26, 26 July 2010 | 526 × 443 (50 KB) | 松岡明芳 | {{Information |Description={{en|1=Acari (or Acarina) are a taxon of arachnids that contains mites and ticks. The diversity of the Acari is extraordinary and its fossil history goes back to at least the early Devonian period.[1] As a result, acarologists ( |
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Image title | OLYMPUS DIGITAL CAMERA |
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Camera manufacturer | OLYMPUS IMAGING CORP. |
Camera model | SP560UZ |
Exposure time | 1/125 sec (0.008) |
F Number | f/4 |
ISO speed rating | 200 |
Date and time of data generation | 17:46, 25 July 2010 |
Lens focal length | 9.84 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Version 1.1 |
File change date and time | 17:46, 25 July 2010 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 17:46, 25 July 2010 |
Meaning of each component |
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Image compression mode | 2 |
APEX exposure bias | -0.7 |
Maximum land aperture | 2.97 APEX (f/2.8) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 0 |
Scene capture type | Standard |
Scene control | Low gain up |
Contrast | Hard |
Saturation | Normal |
Sharpness | Normal |
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